i assume that car in the video is not fitted with the M Performance suspension is it? supposed to be an additional 10mm lower then sport ... doesnt look like it

Yeah, the car in the vid is probably not lowered at all. However, the M-Sport suspension will NOT be 10mm lower than the Sport Line. It will be 10mm lower than the regular height. Basically, it is the same height as the Sport Line. I could be wrong, but this is the general consensus after digging around.